Sawing-machine



6. w. BRAGDON. SAWING MACHINE. APPLICATION FILED JUNE 16, 1917- RENEWED APR. 2, I920.

Patented July 13, 1920.

2 SHEETS-SHEET 1- WITN ESSES ATTORNEY G. W. BRAGDON. SAWING MACHINE. APPLICATION FILED JUNE is. 19m. RENEWED APR.2,1920.

,u N i W NW J &2 m m i m J G m ATTORNEY UNITED STATES PATENT orries.

GEORGE W. BRAGDON, OF SMYRNA MILLS, MAINE, ASSIGNOR OF ONE-FOURTH T67 P. H. TARBELL AND ONE-FOURTH TO J. TARBELL, BOTH 01" MERRILL, MAINE.

SAVJING-MACHINE.

Specification of Letters Patent. 7

Patented July 13, 1920.

Application filed June 16, 1917, Serial No. 175,184. Renewed April 2. 1920. Serial No. 370,900.

To all whom it may concern:

Be it known that I, GEORGE W. BRAGDON, a citizen of the United States, residing at SmyrnaMills, in the county of Aroostook and State of Maine, have invented certain new and useful Improvements in Sawing- Machines, of which the following is a specification.

This invention relates to sawing machine and more particularly to a sawing machine of that type in which the saw is mounted for movement toward and away from the work.

One of the main objects of the invention is to provide a machine of the character stated of simple construction and operation having a saw carrying frame which is rockably mounted and a saw carried thereby, means being provided for normally holding the saw frame in raised position. A. further object is to provide a simple and efficient means for depressing the saw frame so as to move the saw into engagement with the work, means being provided for automatically raising the saw when the depressing means is released. A still further object is to provide a sawing machine of the character stated of very simple construction in which all unnecessary parts are eliminated. Further objects will appear from the detailed description.

In the drawings:

Figure 1 is a top plan view of a sawing.

machine constructed in accordance with my invention 4 Fig. 2 is a side view of the same Fig. 3 is a front view Fig. 1 is a detail of the toggle-lever for operating the saw frame 6 Fig. 5 is a fragmentary detail of the control. lever and the parts associated therewith for depressing and raising the saw frame.

The main supporting frame of the machine is of rectangular shape being provided with the base beams 1 and 2, the vertical posts 3 and 1, transverse plates 5, and the standards 6, 7 and 8 secured on the base beams 1 and 2 at the approximate longitudinal center thereof, these standards being in alincment transversely of the main frame. A side beam 9 is supported by the post 3 and stand 8 at one side of the main frame, a similar beam 10 being supported at the other side by the post 4 and the standard 6. A transverse beam 11 is supported by the side these beams being secured to the central standard 7 at each side thereof. A work receiving board 11 is secured on the upper faces of beamsS) and 13, a similar board 15 being mounted on beams 12 and 10. Board 1 1 is provided at its inner edge with a verti cal back board 16, board 15 being provided with a similar back board 17. The inner ends of the boards 1% and 15 are spaced apart to provide saw opening or passage 18. i

A transverse drive shaft 19 is rotatably mounted on the standards 6, 7 and 8 in bearing-straps 20, 21, and 22, respectively secured on the upperends thereof. A drive pulley 23 is secured on one end of shaft 19 and may be connectedby a belt to a suitable source of power for rotating the shaft. A saw frame designated generally by 2 1 is rockably mounted on shaft 19 between the standards '6 and 7. of the side beams 25 and 26 which are rockable on theshaft, and the transverse brace bars 26, 27 and 28 secured therebetween. A

- saw shaft 29 is rotatably mounted at the forward end of frame 24L in bearing straps 30 and 31 secured to the upper faces of beams 25 and 26, respectively. This shaft is provided with a pulley 32 secured thereon con nected by a belt 33 to a pulley 3d secured on'shaft 19. By this means rotation is imparted to circular saw 35 secured on the inner end of shaft 29. As will be noted more clearly from Figs. 1 and 2 of the drawings, the shaft 18 is positioned a short distance in rear of the longitudinal center of frame 24, so that the normal tendency of this frame will be to tilt forward and downward about shaft 19 so as to bring the saw 35 into engagement with the work supported on the boards 14 and 15, the saw being positioned directly above the saw passage 18 so as to pass between the work supporting This saw frame is composed spaced arms 39 and 40 by a pivot bolt 41 iii- 7 the beam, with a pair of depending spaced 86. These ears receive the upper end ears y {1 pin this link is pivotaily secured, a slight distance above its longitudinalcenter, between the upper ends of the sorted through the'link and the arms. The lower ends of the arms 39 and 40 are pivotally secured to the beam 12 by means of a pivot bolt .1;2passed through the same and the beam. A link i3 is loosely secured at its forward end to link 3'? adjacent the lower end thereof. The link 43 is loosely secured as -15, to a transverse extending operat mg lever 46. One end of this lever is p1v v otally secured, as at M, to the lateral trams beam 9. A tension coil spring 4&8 has its outer end secured to the lever at) at the ap proximate center thereof, the-inner end of the s arin 'hein secured to the centerstand- 7 ard 7. Spring 48 acts to normally hold the lever 46 in its innermost position, this spring also acting through link 43 to rock the link 37 about its pivotal axis so as to raise the forward endof the saw frameQl, the link land arms 39 and'l) constituting, in eifeet, a toggle-lever for this purpose. A pull rod 4:9 is secured to the other end oi: the

lever 46 as at 50,, this red beingpassed through a guide 51 and .providedhon its other end with a hand grip 52. Bypullinp;

' the rod 4-9 outwardly, the lever at} will he with the work. 7

completed, the pull rod 6L9 is released and.

rocked'outwward so as to cause the link a3 to move the lower end of linkfi? outward thus folding; or contractingthe toggle-lever so as to. lower the saw 35 into engagement When the i tha een oi a link 37 pivotally secured between the.

spring 18 acts to automatically raise the saw frame and the saw to inoperative position. By mounting the saw frame in thein'anner described, I insure ease'oi operation of the same, as the frame is pivoted but a short distance in rear of its longitudinal axis and may, therefore be easily rocked on the shaft 19.

Whatlclaim is; I I In sawingmachines, a main frame, a saw frame rockably mounted, .i i iterinediate its ends e eon, a link h ving t uppe e pivotally secured to said saw frame, spaced arms pivotally secured at their lower ends to the main frame, said link being "pi votally secured intermediateits ends between the up p rendsofsa d arm a ransv seop r lever pivotally secured at one end to the main frame, means tor normallyholdi ig said leverv in rearward position, and a co mecting link loosely secured at its fo rward end tothe first mentioned l nk adgacent the lower end thereof and having lts rearwardend loosely secured to said operating whereby,

In testimony whereof Ialli my signature inprese ceot two witnesses.

' V GEO RG E lV.. BRi GDOl lg Witnesses:

E WAFD RO LANQ, W-- TARBELL 

